<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="vue.js"></script>
</head>
<body>
    <div id="root">
        <div>
            <input v-model="content" type="text"/>
            <button @click="addData">提交</button>
        </div>
        <ul->
            <li v-for="(item, index) in list" :key="index">{{item}}</li>
        </ul->
    </div>
    <script>
       new  Vue({
           el: '#root',
           data: {
            content: '' ,
            list: []
           },
           methods: {
             addData: function(){
                 this.list.push(this.content);
                 this.content = '';
             }  
           }
       })  


    </script>
</body>
</html>